Hello Aspirant !

GPAT - Graduate Pharmacy Aptitude Test. It's an exam conducted by NTA and previously AICTE for admission in m.pharm in different Pharmacy Schools in India. Those who qualify for GPAT exam they are eligible for NIPER JEE.

Most important subjects for GPAT exam are

1. Pharmaceutics
2. Pharmacology
3. Pharmacognosy
4. Pharmaceutical Analysis
5. Pharmaceutical Chemistry

Some of the books you can try for preparation are :

1. The Theory of Industrial Pharmacy by Liebermann and Lachmann (BEST for FORMULATIONS)
2. Pharmaceutical Engineering (also under pharmaceutics)- Pharmaceutical Unit Operation by CVS Subrahmanyam
3. Pharmacology- KD Tripathi
4. Pharmacognosy- Kokate and Pharmacognosy by Jai Malik
5. Organic chemistry- Morrison and Boyd.
6. Biochemistry- Satyanarayan and Chakrapani
7. Microbiology- Tutorial Pharmacy by Cooper and Gunn
8. Biopharmaceutics- Brahamankar
9. Analysis- Chatwal or Vogels
10. Spectroscopy- Y.R. Sharma.

These books may help you for cracking GPAT.

Also for better results ,

1. Solve daily 50 to 100 MCQs. This is must.
2. Make your own notes or important points.
3. Brush your concepts by watching youtube videos related to the topic.
4. Solve previous year question papers as much as possible.
5. Analyse where your answers in the mock tests goes wrong and rectify it.

All the best for your career !